Flask Reaction With Glass Stopcock
Product Code : LSK-LF-10420
Flask Reaction With Glass Stopcock (SKU LSK-LF-10420) is a ground-joint reaction flask fitted with a 2 mm glass stopcock held by a spring retention device, so the tap turns smoothly and stays seated. It is offered in 50 mL with a 14/20 socket and 250 mL with a 24/40 socket. Postgraduate and research chemistry labs use it for controlled reactions. Science Lab Supplies supplies the flask from Ambala, India to universities, colleges, tender contractors and distributors.
Specifications
The flask combines a standard ground-glass socket, which accepts condensers, adapters or stoppers, with a side stopcock of 2 mm bore. A spring retention device keeps the stopcock key in place so it does not work loose while the flask is handled or connected to tubing.
| Parameter | Value |
|---|---|
| SKU | LSK-LF-10420 |
| 50 mL version | Socket size 14/20 |
| 250 mL version | Socket size 24/40 |
| Stopcock | Glass, 2 mm |
| Stopcock retention | Spring retention device for smooth turning |
| Supplied by | Science Lab Supplies, Ambala, India |
Applications and Experiments for the Reaction Flask with Stopcock
The stopcock lets the flask be closed off, evacuated or flushed with gas through tubing while the neck carries a condenser or stopper. That makes this reaction flask useful chemistry lab equipment in India for syntheses that must be kept sealed or run under a controlled atmosphere.
- M.Sc. and research organic and inorganic synthesis where the reaction vessel is connected to a vacuum or gas line.
- Storing small quantities of a reaction mixture or solution under a closed stopcock between steps.
- B.Tech. chemical engineering and B.Pharm. labs assembling ground-joint glassware set-ups.
Turn the stopcock gently and do not force it; if it resists, release the retention spring and clean the key before refitting.
Standard Scope of Supply
Each reaction flask is supplied with its 2 mm glass stopcock and spring retention device fitted, in the 50 mL (14/20) or 250 mL (24/40) size you order. Stoppers, condensers and tubing are separate items and can be listed as optional accessories on the quotation.
Packing, MOQ and Lead Time
A quotation can cover one reaction flask for a research group or several of each size for a teaching lab; it sets out packing, delivery time and price for the quantity requested. Other ground-joint flasks and funnels can go on the same quotation.
Science Lab Supplies, a registered exporter with an Importer-Exporter Code, is able to ship to buyers in South Africa, Qatar, Sri Lanka, Vietnam, Malaysia and Peru. Science Lab Supplies is registered for GST (GSTIN 06ADEPJ0574F2ZU). Send requirements via the contact page, build a list in the enquiry cart, or see the lab tender page for tenders.
Frequently Asked Questions
What does the spring retention device do?
It holds the glass stopcock key in its barrel so the tap turns smoothly and cannot slip out when the flask is moved or connected to tubing.
Which sizes are available?
Two versions are listed: 50 mL with a 14/20 socket and 250 mL with a 24/40 socket. Choose the socket to match your condenser or adapter.
Who supplies the Flask Reaction With Glass Stopcock?
It comes from Science Lab Supplies in Ambala, India, which quotes single flasks, lab sets and tender quantities.
Can it be quoted with other ground-joint glassware?
Yes. List the flasks, funnels and adapters you need in one enquiry and they will be priced together on a single quotation.
Related Flasks and Funnels
These items from the same ranges complement this reaction flask with other shapes and capacities and a funnel for sealed drop-wise addition, so a synthesis lab can order its whole set of reaction glassware on one quotation.
- Round Bottom Flask, Narrow Neck — rimmed-neck flask for heating and boiling.
- Flask Pear Shape Single Neck — for semi-micro distillation.
- Flask Pear shape with Two Neck — two necks for extra fittings.
- Pressure Equalising Funnels Pear shape — drop-wise addition into sealed flasks.
Browse the full laboratory flasks range or all school lab equipment.
Last updated: 25 September 2026
